当索引有数据时，Solr没有返回结果

Question

I've got a Solr instance (version 1.4) that is returning no results when searching using *:* via its web interface.

I checked it's SolrHome to check it's index. I can verify that there is available content found in data/index/

I also checked solrconfig.xml for dataDir element as defined here and confirm that it does point to the above directory.

I've checked the catalina and tomcat6-stderr logs found in ..\\Program Files\\Apache Software Foundation\\Tomcat 6.0\\logs and found no errors.

The only thing that I can think of is that within the Apache Software Foundation\\Tomcat 6.0 is a solr directory that has an empty data/index directory but I can't find where this could be referenced in solrconfig.xml

Does anyone have any idea why this could be happening?

Update

Looking at the web interfaces' statistics, it shows a core called "searcher" with numDocs: 0.

Answer 1

If you have numDocs: 0 , you don't have any documents in your index. You can still have index files around if optimize hasn't been invoked on your index (ie all documents that were available has been marked as deleted, but the index hasn't been rewritten - so those documents hasn't been expunged), and an empty index will still have a few files around with ignorable sizes.